INTRODUCTION

bash2cpp converts simple bash scripts to c++ code. It requires c++17 for file IO and expects c++ code to run in Linux. Code also uses boost::format for printf format specifier conversion. Though, with some effort Linux dependency can be removed but this is not in radar at this moment.

Reasons why you may want to try bash2cpp are:

Faster execution time by using native binary as opposed to shell script.
Code obfiscuation to prevent modification.

bash2cpp is not a complete translator but does a good job for simple scripts.

REQUIREMENTS

curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -

INSTALLATION

git clone https://github.com/franksinankaya/bash2cpp.git
cd bash-parser
git submodule init
git submodule update
npm install --save-dev
npm run build

USAGE

mkdir -p gen
node app.js test.sh gen/test.cpp
optional (beautify code)
- astyle -q -n gen/%test.cpp
if you have WSL
- wsl g++ gen/test.cpp -o gen/test -lpcre -std=c++17 -g
if you are on linux
- g++ gen/test.cpp -o gen/test -lpcre -std=c++17 -g
Size and speed optimization
- g++ gen/test.cpp -o gen/test -lpcre -std=c++17 -O3 -ffunction-sections -fdata-sections -Wl,--gc-sections -flto -g

IMPROVEMENT

BUILD TESTS

wsl ./test.sh

TROUBLESHOOTING

If something doesn't work, simplify your shell script and convert one at a time. Review missing functionality list.

MISSING FUNCTIONALITY

HIGH PRIORITY

echo -e missing
checkroot.sh: while loop read from #9 file descriptor
checkroot.sh: exec descriptor handling
handle :exit 0
exec 0>&1
variable.sh: dropping TIMESTAMP variables
functions: parameter expansion inside awk string does not work
if [[ ( $username == "admin" && $password == "secret" ) ]] does not work
if [ -z ${VAR+x} ];
dmesg -s 131072 > gen/dmesg doesn't work
echo {A..Z}{0..9} does not work
echo 1.{1..9}
str+=", " doesn't work
doesn't handle special characters well
has problems with cat << EOF .. EOF
regex string match in substring.sh does not work

LOW PRIORITY

supports only 11 arguments
partial read support
echo -n is assumed to be the first three characters